I just purchased a 2004 GX470 about a month ago. It has the Marc Levinson sound system with navigation, cassette radio unit with a multi-disc player in the glove box. When you push the Audio button the nav screen, all the screen says is "Audio Off" with no audio coming from the radio. When my lights are on at night, I noticed the radio unit itself is not illuminated which makes me believe I have a power issue possibly to the radio unit. After some research, I did come across the Service manual for the radio ( http://www.clublexus.com/forums/att...-toyota_kex-m8527-kex-m8727_servicemanual.pdf ).
If I put in a destination in the navigation, you can hear the audible instructions. If you push the other buttons on the nav screen, you can hear an audible tone at the press of the button. However, when you push the audio button, it just gives you the message "audio off". I brought a multimeter home from work the other night to check the power coming through the wiring harnesses and from what I could tell, I am not getting any power. (***Side note - I know enough to be dangerous but I do not claim to be a technician by any means and most of my information is from some engineering friends and YouTube...). I referenced the various pin positions in the radio service manual to know which ones to check. I also checked with the vehicle key turned to ACC mode and then also checked with the engine running. Both times, it didn't appear that I had any power coming through to the radio unit. I also checked the fuses and they all seemed to be fine.
I called one of the local car audio shops here in town that I received a good recommendation from and he basically said good luck and they wouldn't touch it with being OEM and knowing all the issues that the Marc Levinson system has had.
Has anyone else seen this issue? Any ideas on where the power would actually be coming from that feeds the radio head unit? The wire schematic is included on the service manual but it's tough to make heads or tails of it.
Thanks in advance for any responses.
Hi, Everyone. I just purchased a used 2015 ES300h and I need to update the navigation system map. My old HS250h required that the dealer do any nav updates, but my new car has a micro SD card slot so it looks like an update should be pretty straightforward. Is it possible to buy the card somewhere for this GEN 8 system and install a new card myself? My local Lexus dealer is saying I have to buy a replacement card from them for $210 then pay to have it programmed. Any guidance, suggestions or options would be very much appreciated. Thank you!
I am looking for a navigation sd card for a 2104 Ct200h. MIne was missing when I purchased the car. The dealer said it must be ordered from Japan. (takes weeks if not months!!!) There are several on Ebay ,but I am not sure if they are the correct one. If anyone has a 2014 Ct200h or knows the correct number (number printed on the card it self) please let me know asap.
I asked the dealer for the number from the card but all they would give me is the standard lexus part number.
thanks for all your help